Method for measuring stress on steel by determining the reverse magnetic permeability under a magnetic bias field
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 23, 1991
Grant Date -
N/A
app pub date -
Mar 9, 1990
filing date -
Mar 17, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rapid and reliable non-destructive method is proposed for the determination of stress in a steel material by determining the reversible magnetic permeability .mu. under a magnetic bias field H.sub.0 in the range of approach to the saturation magnetization, calculating the factor M in the equation .mu.=1+M/H.sub.0.sup.3 by using the value of .mu., and calculating .sigma..sub.1, .sigma..sub.2 and .theta. by solving the equation ##EQU1## in which .sigma..sub.1 is a principal stress, .sigma..sub.2 is the principal stress perpendicular to .sigma..sub.1, .theta. is the angle between .sigma..sub.1 and the direction of measurement of .mu., a is the value of .sqroot.M in a stress-free state and b is the stress sensitivity, a and b being determined separately.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully